Updated modules:

bibdk_theme
ding_facetbrowser
ting_openformat
ting_infomedia
bibdk_actions
bibdk_behaviour
bibdk_cart
bibdk_frontend
bibdk_holdingstatus
bibdk_linkme
bibdk_openuserstatus
bibdk_reservation
bibdk_searchhistory
bibdk_usersettings
Tagging version 7.x-0.21.
Merge branch 'release/7.x-0.21' into develop